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Ivory coast microtektites and geomagnetic reversals

Schneider, David A.; Kent, Dennis V.

The reported association of the Ivory Coast microtektite occurrence with the onset of the Jaramillo normal polarity subchron has given support to the notion that impact events can give rise to geomagnetic reversals. We re-evaluate the paleomagnetic stratigraphy of two critical deep-sea sediment cores bearing Ivory Coast microtektites (K9-57 and V27-239) and show that this event likely occurred during the Jaramillo subchron approximately 30 kY after its onset and 40 kY before its termination. This new result thus argues against any causal relationship between the Ivory Coast tektite-producing event and a geomagnetic polarity reversal.

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Title
Geophysical Research Letters
DOI
https://doi.org/10.1029/GL017i002p00163

More About This Work

Academic Units
Lamont-Doherty Earth Observatory
Biology and Paleo Environment
Published Here
August 2, 2011